Twist fibrous structure of CS–SnO2–PANI ternary hybrid composite for electrochemical capacitance performance

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40567-40576 ◽  
Author(s):  
M. Karpuraranjith ◽  
S. Thambidurai
Keyword(s):  
Hybrid Composite ◽  
Oxidative Polymerization ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Step Method ◽  
Aniline Monomer ◽  
Ammonium Persulphate ◽  
Capacitance Performance ◽  
Simple Chemical

In this study, a twisted fibrous CS–SnO2–PANI ternary hybrid composite structure was synthesized via a two step method; the CS–SnO2 hybrid composite was prepared by a simple chemical precipitation method and the resulting CS–SnO2 suspension was coated with PANI by in situ chemical oxidative polymerization of aniline monomer in acidic medium using ammonium persulphate as the oxidant.

Structural and morphological characterization of CdS nanoparticles

2020 ◽  
Vol 10 ◽  
Author(s):  
Manish Dwivedi ◽  
Vijay Tripathi ◽  
Dhruv Kumar ◽  
Dwijendra K. Gupta
Keyword(s):  
Blue Shift ◽  
Chemical Precipitation ◽  
Morphological Characterization ◽  
Precipitation Method ◽  
Cds Nanoparticles ◽  
Cubic Phase ◽  
Simple Chemical ◽  
Xrd Patterns ◽  
Average Size ◽  
Physical Tools

Aims: CdS nanoparticles are an attractive material having application in various field like as pigment in paints, biotag for bioimaging and many more optoelectronic as well as biological applications. Present study aims to synthesize and characterize the CdS nanoparticles to make it applicable in different areas Objectives: Preparation CdS nanoparticles by using simple and facile chemical methods and further physical and structural characterization using various physical tools Methods: In present work CdS nanoparticles has been synthesized by using rationally simple chemical precipitation method with some modi-fication on temperature and incubation time in existed methods. Characterizations were done by employing XRD, SEM, TEM, AFM tech-niques Results: Simple chemical method produces the CdS nanoparticles with the size about 100-200 nm in length and 5-10 nm in diameter. The SEM studies show that the CdS nanoparticles can agglomerate and form a continuous network like structure. The X-ray diffraction (XRD) measurements show the single-phase formation of CdS nanoparticles with the structure of cubic phase, and the broadening of XRD patterns indicates that the prepared samples are nanostructured. Our analysis on CdS nanoparticles by using transmission electron microscope and atomic force microscope (AFM) revealed that the nanoparticles form both spherical and nearly rod shaped with the average size applicable for biotagging. UV-Vis spectroscopic analysis reveals blue shift in the absorption peak probably caused by quantum confinement Conclusion: The observed CdS nanoparticles were appeared yellow in color. The XRD pattern of the CdS nanoparticles showed that the materials were of nanometric sized regime with a predominantly cubic phase along with the rod and round morphology. The study and char-acterization of CdS nanoparticles will bring us a new approach to understand biological problem by tagging nanoparticles with biomolecules and further suggests that the CdS nanoparticles formulate it more suitable biocompatible nanomaterial for biotagging and bioimaging

scholarly journals Ionic Liquid-Assisted Synthesis of Ag3PO4 Spheres for Boosting Photodegradation Activity under Visible Light

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 788
Author(s):  
Beibei Zhang ◽  
Lu Zhang ◽  
Yulong Zhang ◽  
Chao Liu ◽  
Jiexiang Xia ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Visible Light ◽  
High Efficiency ◽  
Chemical Precipitation ◽  
Active Species ◽  
Precipitation Method ◽  
Dihydrogen Phosphate ◽  
Xrd Pattern ◽  
Simple Chemical ◽  
Visible Light Driven

In this work, a simple chemical precipitation method was employed to prepare spherical-like Ag3PO4 material (IL-Ag3PO4) with exposed {111} facet in the presence of reactive ionic liquid 1-butyl-3-methylimidazole dihydrogen phosphate ([Omim]H2PO4). The crystal structure, microstructure, optical properties, and visible-light photocatalytic performance of as-prepared materials were studied in detail. The addition of ionic liquids played a crucial role in forming spherical-like morphology of IL-Ag3PO4 sample. Compared with traditional Ag3PO4 material, the intensity ratio of {222}/{200} facets in XRD pattern of IL-Ag3PO4 was significantly enhanced, indicating the main {111} facets exposed on the surface of IL-Ag3PO4 sample. The presence of exposed {111} facet was advantageous for facilitating the charge carrier transfer and separation. The light-harvesting capacity of IL-Ag3PO4 was larger than that of Ag3PO4. The photocatalytic activity of samples was evaluated by degrading rhodamine B (RhB) and p-chlorophenol (4-CP) under visible light. The photodegradation efficiencies of IL-Ag3PO4 were 1.94 and 2.45 times higher than that of Ag3PO4 for RhB and 4-CP removal, respectively, attributing to a synergy from the exposed {111} facet and enhanced photoabsorption. Based on active species capturing experiments, holes (h+), and superoxide radical (•O2−) were the main active species for visible-light-driven RhB photodegradation. This study will provide a promising prospect for designing and synthesizing ionic liquid-assisted photocatalysts with a high efficiency.

scholarly journals Synthesis and Characterization of Lixfepo4/C-Ppy Composite Cathode Material with Excess of Li+ Doping

2019 ◽  
Vol 9 (2) ◽  
pp. 5254-5257
Keyword(s):  
Composite Cathode ◽  
Chemical Precipitation ◽  
Polymerization Process ◽  
Step Method ◽  
Xrd Pattern ◽  
Li Doping ◽  
Unit Cell Size ◽  
Transmission Electron ◽  
Heat Treated

In-situ Polypyrrole (PPy) coating was performed on the surface of LixFePO4 /C (x=0.95 to 1.20) particles using iron (III) tosylate as oxidizer. The composite material LixFePO4 /C (x=0.95 to 1.20) was synthesized by two step method. FePO4 /polyaniline particles were first synthesized by chemical precipitation and were further heat treated with lithium acetate and sucrose under reduced atmosphere. XRD pattern confirms that Li+ addition to LiFePO4 has increased interplaner spacing and of the unit cell size. Impurity phase appears with x=1.15 and 1.20 which further disappears after polymer coating. After polymerization process the XRD pattern shows Li0.05FePO4 and LiFePO4 phases and both the phases have same electrochemical behavior. Morphology of the LixFePO4 /C and LixFePO4 /C-PPy was studied by using FE-SEM and it was found that particles are spherical with size range below 200nm. Transmission Electron Microscope (TEM) also confirms that LixFePO4 /C isolated particles were well encapsulated within the polymer matrix

ZnxCd1-xS/g-C3N4 nanocomposites: synthesis, characterization, and photocatalytic activity

2020 ◽  
Vol 98 (8) ◽  
pp. 441-444
Author(s):  
Xiaoyue Li ◽  
Limin Dong ◽  
Lianwei Shan ◽  
Xinxin Jin ◽  
Yingkui Guo
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Composite Materials ◽  
Synergistic Effect ◽  
Light Absorption ◽  
Catalytic Effect ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Visible Light Absorption ◽  
Simple Chemical

In this work, we prepared ZnxCd1-xS/g-C3N4 nanocomposites with excellent catalytic effect by the simple chemical precipitation method. The ZnxCd1-xS/g-C3N4 composite with excellent effect of degrading methylene blue (MB) was prepared by adjusting the ratio of Zn to Cd. The Zn0.25Cd0.75S/g-C3N4 nanocomposites have the highest degradation efficiency, which can reach 92.25%. The specific surface area and visible light absorption range are increased by the synergistic effect of the combination of ZnxCd1-xS and g-C3N4. The ZnxCd1-xS/g-C3N4 nanocomposites prepared by this study with excellent photocatalytic properties provide a method for the preparation of new composite materials in the future.

Synthesis of FeC2O4-Graphene Composites and their Application in Removal Dyes

2012 ◽  
Vol 463-464 ◽  
pp. 533-537 ◽  
Author(s):  
Shui Sheng Wu ◽  
Ya Ming Wang ◽  
Qing Ming Jia ◽  
Li Li Gu ◽  
Yan Lin Sun
Keyword(s):  
Energy Storage ◽  
Graphene Nanosheets ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Energy Storage Materials ◽  
Graphene Sheets ◽  
Storage Materials ◽  
Simple Chemical

A well-organized composite of graphene nanosheets decorated with FeC2O4 particles was synthesized through a simple chemical precipitation method. The FeC2O4 nanoparticles obtained were 100-150 nm in size and homogeneously anchored on graphene sheets as spacers to keep the neighboring sheets separated. The FeC2O4-graphene exhbited excellent performances in absorption propties and supercapacitor make potential uses as environment and energy storage materials in future.

Size Controllable Synthesis and Characterization of CuO Nanostructure

2018 ◽  
Vol 915 ◽  
pp. 98-103 ◽  
Author(s):  
Duygu Candemir ◽  
Filiz Boran
Keyword(s):  
Freeze Drying ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Peg 4000 ◽  
Structure Morphology ◽  
Cuo Nanostructure

In this study, copper oxide (CuO) nanostructures were successfully prepared by adding EG (ethylene glycol) and PEG (4000, 8000) (polyethylene glycol) via an in-situ chemical precipitation method. EG and PEG (4000, 8000) were effective for changing the particular size of CuO and we examined the effects of drying type such as freeze drying, muffle and horizontal furnace on the size of CuO nanostructure. The structure, morphology and elemental analysis of CuO nanostructure were analyzed by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). Also, the CuO nanostructures showed excellent electrical conductivity by the changing of PEG’s molecular weight and drying processes.

Synthesis and Characterization of Modified Diatomite-Leaf-Like CuO Nanosheet Composites

2018 ◽  
Vol 915 ◽  
pp. 93-97
Author(s):  
Filiz Boran
Keyword(s):  
Chemical Precipitation ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Morphology ◽  
Cuo Nanosheets ◽  
20 Nm ◽  
Modified Diatomite

In this work, firstly we described the effect of freeze drying on modification of raw diatomite. And then, modified diatomite-leaf-like copper oxide (CuO) nanosheet composite was successfully prepared by surfactant-free in-situ chemical precipitation method. The structure, morphology and elemental analysis of CuO nanosheets and its composite were analyzed by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy and energy dispersive X-ray spectroscopy (EDAX). Dimensions of leaf-like CuO nanosheets were approximately determined as 160 nm in width, 320 nm in length and 20 nm in thickness. According to the EDAX spectrum, leaf-like CuO nanosheets composed of Cu and O atoms without any impurity and also uniformly covered the entire surface of modified diatomite.

HIGH PRESSURE EFFECTS ON ELECTRICAL RESISTIVITY AND DIELECTRIC PROPERTIES OF NANOCRYSTALLINE SnO2

2006 ◽  
Vol 05 (04n05) ◽  
pp. 471-477 ◽  
Author(s):  
P. THANGADURAI ◽  
A. CHANDRA BOSE ◽  
S. RAMASAMY ◽  
R. KESAVAMOORTHY ◽  
T. R. RAVINDRAN
Keyword(s):  
High Pressure ◽  
Dielectric Properties ◽  
Complex Impedance ◽  
Chemical Precipitation ◽  
Pressure Effects ◽  
Precipitation Method ◽  
Grain Sizes ◽  
Electrical And Dielectric Properties ◽  
High Pressure Effects

Rutile structured nanocrystalline tin oxide (nano- SnO 2) was prepared by chemical precipitation method with different grain sizes. Its electrical and dielectric properties were studied using complex impedance spectroscopy under different hydrostatic pressures. These studies showed a transition in nano- SnO 2 under high-pressure. The transition pressures obtained from both the resistivity and dielectric measurements agree with each other and increase considerably with decrease in grain size. In order to find whether the transition under pressure is structural related or not, in situ high pressure Raman spectroscopy was done up to 3.38 GPa at room temperature. No structural change was observed and the transition may be due to the co-operative phenomenon of the change in band gap and better connectivity between grain boundaries.

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